Pulsed power technology has an important trend in the world,which has high power,long pulse,high operating frequency and miniaturization.Thus all-solid-state pulsed power technologies based on semiconductor devices have drawn more attention and widely used.This article introduces several kinds of semiconductor switches,such as SCR,IGBT,and SOS.The charging system based on SCR,the Marx generator,and pulsed transformer topology using IGBTs,and the system using SOS are described in detail.Some experimental results are also given.The use of semiconductor switches technology in solid state Marx generate can solve the disappointments such as short life time, low operating frequency,low reliability of conventional pulsed power equipments and has extensive perspective.
介绍了一种新型圆极化高功率微波天线,可辐射高功率微波源所产生的 TEM 或 TM_(01)模。该天线由同轴插板式模式转换器和一种新型同轴插板式喇叭组成,模式转换器将输入的同轴 TEM 模转换为4个相位依次相差90°的扇形波导 TE_(11)模,并通过新型喇叭辐射,在轴向上获得了圆极化辐射场。优化设计了一个中心频率为4GHz 的天线,其总长度为385mm,喇叭口径320mm。在中心频率上天线增益为19.3dBi,轴比1.06,反射损耗-20dB。在 3.8～4.2GHz 的频率范围内增益大于18.9dBi,反射损耗小于-10dB。
